The HMS Argus was the first aircraft carrier with a flat-top design, constructed during World War 1 from the Italian ocean liner Conte Rosso. It served as an experimental carrier until the end of the war but did not see combat. The Argus continued serving into the 1920s as the Royal Navy gained experience operating carriers. It was recommissioned during World War 2 to ferry aircraft despite its age. The HMS Argus spent its final years as a training ship before being scrapped in 1946, having served in both world wars and helped pioneer the modern aircraft carrier design.